1. Office of Highway Safety Human Performance Dennis Collins

2. Human Performance Issues General information Driver’s head congestion Accident trip DriveCam II data Summary

3. General Driver Information Valid license, years of experience 71 years old with valid medical certificate Obstructive sleep apnea (OSA) in personal medical records Reported head congestion in the 3 days prior to accident trip

4. Driver’s Head Congestion Runny nose, head congestion Driver believed he had cold 7,000+ foot altitude change Consistent with altitude sickness Congestion interfered with use of CPAP device while in Telluride Sleep quality poor

5. The Accident Trip Awoke 6:45 a.m., began trip at 3:15 p.m. Stopped to remove chains from bus Interviewed passengers said: – Drifted onto shoulder – Steering caused objects to slide – Passengers concerned about speed

6. DriveCam II System Forward view Audio Forward/lateral acceleration Interior view – No hands, steering wheel – 20 seconds (10 before crash)

7. DriveCam II Interior Video Cannot tell if driver showing signs of fatigue Two steering inputs to the left Objects in motorcoach move and passengers react Driver only reacts as crash occurs– after passengers

8. Summary Reduced quality sleep 3 nights prior to crash Long day with long period of vigilance Vehicle’s excessive speed Reduced situational awareness Slowed/delayed reactions